Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A user equipment (UE) device, the UE device comprising: an antenna for performing wireless communications with a base station (BS) over a channel; a memory for storing one or more channel state feedback (CSF) reports; wherein the UE is configured to: store a prior CSF report from a prior discontinuous reception (DRX) cycle; compare a cycle length for the DRX to a threshold value; if the cycle length is less than the threshold value: provide the prior CSF report from the prior DRX cycle as a current CSF report to the BS; if the cycle length is greater than the threshold value: generate a new CSF report; provide the new CSF report as the current CSF report to the BS.
A user equipment (UE) device (like a phone) communicates wirelessly with a base station. It stores previous channel state feedback (CSF) reports, which describe the channel quality. The UE compares the length of its discontinuous reception (DRX) cycle (the time it sleeps between listening for data) to a threshold. If the DRX cycle is short (less than the threshold), it reuses a prior CSF report, assuming the channel hasn't changed much. If the DRX cycle is long (greater than the threshold), it generates a new CSF report, updates the stored prior CSF report, and sends the new report.
2. The UE device of claim 1 , wherein the UE device is configured to compare the cycle length for the DRX to the threshold value in order to estimate the variance of the channel.
The user equipment (UE) estimates channel variance by comparing the length of its discontinuous reception (DRX) cycle to a threshold value. This estimation determines how much the channel conditions are likely to have changed during the DRX cycle. If the DRX cycle is short relative to the threshold, the UE assumes low channel variance and reuses a previous channel state feedback (CSF) report. This saves power compared to always generating and transmitting a new CSF report.
3. The UE device of claim 1 , wherein the UE device is configured to determine if the UE device is moving or stationary; wherein the UE device is configured to adjust the threshold value based on whether the UE device is determined to be moving or stationary.
The user equipment (UE) determines if it's moving or stationary. Based on this determination, it adjusts the threshold value used to decide whether to reuse or generate a new channel state feedback (CSF) report during discontinuous reception (DRX). If the UE is moving, the threshold is adjusted downwards, because the channel is changing faster, so fresh CSF reports are needed. If the UE is stationary, the threshold is adjusted upwards, as the channel characteristics are more stable.
4. The UE device of claim 3 , wherein the UE device determines whether the UE device is moving or stationary using Doppler shift estimation.
The user equipment (UE) uses Doppler shift estimation to determine if it is moving or stationary. Doppler shift refers to the change in frequency of a signal due to relative motion between the UE and the base station. A significant Doppler shift indicates movement, while a negligible Doppler shift indicates the UE is stationary. This movement information informs the adjustment of the threshold used for channel state feedback (CSF) report generation in discontinuous reception (DRX) cycles.
5. The UE device of claim 1 , wherein when the cycle length is less than the threshold value the DRX cycle length is within a reasonable range and the stored prior CSF report from a previous DRX cycle still reflects the channel quality for current DRX cycle.
When the discontinuous reception (DRX) cycle length is less than the threshold, it implies the DRX cycle length is within a reasonable range and the stored prior channel state feedback (CSF) report from a previous DRX cycle still accurately reflects the current channel quality. This condition allows the user equipment (UE) to reuse the prior CSF report, saving power, because the channel is assumed to be relatively stable during shorter DRX cycles. This avoids unnecessary CSF updates when the channel conditions haven't significantly changed.
6. A method for providing a channel state feedback (CSF) report by a user equipment (UE) device, the method comprising: the UE device performing: storing a prior CSF report from a prior discontinuous reception (DRX) cycle; comparing a cycle length for the DRX to a threshold value; if the cycle length is less than the threshold value: providing to a base station the prior CSF report from the prior DRX cycle as a current CSF report; if the cycle length is greater than the threshold value: generating a new CSF report; providing to the base station the new CSF report as the current CSF report; storing the new CSF report as the prior CSF report; performing said comparing and said providing or said generating, said providing, and said storing a plurality of times.
A user equipment (UE) device stores a channel state feedback (CSF) report from a previous discontinuous reception (DRX) cycle. It compares the current DRX cycle length to a threshold value. If the cycle length is shorter than the threshold, the UE sends the old CSF report to the base station. If the cycle length is longer than the threshold, the UE generates a new CSF report and sends it to the base station, storing it for future use. This process repeats for multiple DRX cycles, adapting CSF reports based on DRX cycle length.
7. The method of claim 6 , wherein said comparing and said providing or said generating, said providing, and said storing is performed for each DRX cycle.
The user equipment (UE) compares the current discontinuous reception (DRX) cycle length to a threshold value, then either provides a stored CSF report or generates a new one, stores the new one, and does this entire process FOR EACH DRX CYCLE. This ensures that the UE is constantly evaluating whether to reuse old channel information or create new information to send to the base station to maintain efficient wireless communication.
8. The method of claim 6 , further comprising: determining a current Doppler shift; and adjusting the threshold value based on the current Doppler shift.
A user equipment (UE) estimates the Doppler shift and adjusts the threshold value used for deciding whether to reuse a previous channel state feedback (CSF) report during discontinuous reception (DRX). A higher Doppler shift suggests faster movement and thus a more rapidly changing channel. The threshold is adjusted based on the estimated Doppler shift to determine if the stored CSF report is still valid or a new one needs to be generated.
9. The method of claim 8 , wherein said adjusting comprises decreasing the threshold value for higher Doppler shift values and increasing the threshold value for lower Doppler shift values.
When using Doppler shift to adjust the threshold value for deciding whether to reuse a channel state feedback (CSF) report in discontinuous reception (DRX), the user equipment (UE) DECREASES the threshold for HIGHER Doppler shift values (meaning the UE is moving faster). The UE INCREASES the threshold for LOWER Doppler shift values (UE is nearly stationary). This balances power savings with channel accuracy: use old reports when stationary, create new reports when moving fast.
10. The method of claim 6 , wherein said providing the current CSF report is performed at a first sub-frame of the DRX on-duration.
The user equipment (UE) sends the current channel state feedback (CSF) report to the base station at the FIRST sub-frame of the discontinuous reception (DRX) on-duration. This specifies precisely WHEN the CSF report is transmitted within the DRX cycle. By transmitting early in the on-duration, the base station can utilize the CSF report for scheduling data transmission in the remainder of the on-duration, optimizing resource allocation.
11. A non-transitory, computer accessible memory medium storing program instructions, wherein the program instructions are comprised in a user equipment (UE) device, wherein the program instructions are executable to: store prior channel state information from a prior reception cycle; compare a cycle length for the reception cycle to a threshold value; if the cycle length is less than the threshold value: providing the prior channel state information from the prior reception cycle as current channel state information to a base station; if the cycle length is greater than the threshold value: generate new channel state information; 3 provide the new channel state information as the current channel state information to the base station; store the new channel state information as the prior channel state information; wherein the program instructions execute a plurality of times during operation of the UE device.
A non-transitory computer-readable memory (like flash storage) stores instructions for a user equipment (UE). The instructions, when executed, cause the UE to store prior channel state information, compare a reception cycle length to a threshold, and then either provide the prior information or generate new channel state information. The instructions are repeatedly executed during the UE's operation. If the cycle length is less than the threshold, the previous channel state is provided. Otherwise, a new channel state is generated, provided, and stored as the previous channel state for future use.
12. The non-transitory, computer accessible memory medium of claim 11 , wherein the program instructions are executable to compare the cycle length for the reception cycle to the threshold value in order to estimate the variance of the channel.
The computer-readable memory stores instructions that cause the user equipment (UE) to estimate channel variance by comparing the reception cycle length to a threshold value. This instruction works in conjunction with other stored instructions where a shorter cycle length relative to the threshold suggests low channel variance, allowing the UE to reuse prior channel state information. This variance estimation improves efficiency by minimizing unnecessary channel state updates.
13. The non-transitory, computer accessible memory medium of claim 11 , wherein the program instructions are further executable to: determine if the UE device is moving or stationary; and adjust the threshold value based on whether the UE device is determined to be moving or stationary.
The computer-readable memory contains further instructions to determine if the user equipment (UE) is moving or stationary and adjusts the threshold value based on whether the UE is moving or stationary. This adjustment affects whether the UE reuses previous channel state information or generates new information. If the UE is moving, the threshold is decreased, prompting more frequent updates of channel state information.
14. The non-transitory, computer accessible memory medium of claim 13 , wherein the program instructions are executable to determine whether the UE device is moving or stationary using Doppler shift estimation.
The computer-readable memory stores instructions that cause the user equipment (UE) to use Doppler shift estimation to determine whether the UE is moving or stationary. Based on the determined mobility, a threshold value is adjusted. This threshold determines whether to reuse previous channel state information or to generate new channel state information for a base station.
15. A user equipment (UE) device, the UE device comprising: an antenna for performing wireless communications with a base station (BS) over a channel; a memory for storing one or more channel state feedback (CSF) reports; a processing element coupled to the memory wherein the processing element is configured to: store a prior CSF report from a prior discontinuous reception (DRX) cycle; estimate the variance of the channel; if the estimate of the variance of the channel is low: provide the prior CSF report from the prior DRX cycle as a current CSF report to the BS; if the estimate of the variance of the channel is not low: generate a new CSF report; provide the new CSF report as the current CSF report to the BS.
A user equipment (UE) has an antenna, memory, and a processor. The processor stores a previous channel state feedback (CSF) report. It then ESTIMATES the variance of the wireless channel. If the estimated variance is low, the processor reuses the old CSF report. If the estimated variance is high, the processor generates a new CSF report, and provides that.
16. The UE device of claim 15 , wherein the processing element is configured to estimate the variance of the channel by comparing a cycle length for the DRX to a threshold value.
The processing element in the UE estimates the variance of the wireless channel by COMPARING the length of the discontinuous reception (DRX) cycle to a threshold value. Low variance is inferred if the DRX cycle is short compared to the threshold, which means the channel conditions are assumed not to have changed much since the last CSF report.
17. The UE device of claim 16 , wherein the processing element is configured to determine if the UE device is moving or stationary; wherein the processing element is configured to adjust the threshold value based on whether the UE device is determined to be moving or stationary.
The processing element in the UE determines if the UE is moving or stationary. The processing element then adjusts the threshold value used for determining the variance of the channel based on whether the UE is determined to be moving or stationary. This means that the threshold used for comparing DRX cycle length is adaptive based on whether the UE is moving or not.
18. A user equipment (UE) device, the UE device comprising: an antenna for performing wireless communications with a base station (BS) over a channel; a memory for storing one or more channel state feedback (CSF) reports; a processing element coupled to the memory; wherein the processing element is configured to: store a prior CSF report from a prior discontinuous reception (DRX) cycle; determine whether the UE device is moving or stationary; if the UE device is determined to be stationary: provide the prior CSF report from the prior DRX cycle as a current CSF report to the BS; if the UE device is determined to be moving: generate a new CSF report; provide the new CSF report as the current CSF report to the BS.
A user equipment (UE) stores a prior channel state feedback (CSF) report from a previous DRX cycle. It determines if the UE is moving or stationary. If the UE is STATIONARY, it reuses the old CSF report. If the UE is MOVING, it generates a new CSF report and sends that to the base station.
19. The UE device of claim 18 , wherein the processing element determines whether the UE device is moving or stationary in order to estimate the variance of the channel.
The processing element in the UE determines whether the UE is moving or stationary IN ORDER TO ESTIMATE the variance of the channel. Determining if the UE is moving or stationary provides an indication of how rapidly the channel is changing, and thus the variance in channel conditions over time.
20. The UE device of claim 18 , wherein the processing element is configured to determine whether the UE device is moving or stationary by determining a current Doppler shift.
The UE determines whether it is moving or stationary by determining the current Doppler shift. This Doppler shift informs the decision to reuse or generate a new channel state feedback (CSF) report. A higher Doppler shift indicates movement, prompting the generation of a new report.
21. A method for operating a user equipment (UE) device, the method comprising: storing a prior channel state feedback (CSF) report from a prior discontinuous reception (DRX) cycle; determining whether the UE device is moving or stationary; if the UE device is determined to be stationary: providing the prior CSF report from the prior DRX cycle as a current CSF report to a base station (BS); if the UE device is determined to be moving: generating a new CSF report; providing the new CSF report as the current CSF report to the BS.
A method for operating a user equipment (UE) involves storing a prior channel state feedback (CSF) report from a previous DRX cycle. The UE then determines whether it is moving or stationary. If the UE is stationary, the old CSF report is sent to the base station. If the UE is moving, a new CSF report is generated and sent to the base station.
22. The method of claim 21 , wherein said determining whether the UE device is moving or stationary operates to estimate the variance of the channel.
Determining whether the UE is moving or stationary OPERATES TO ESTIMATE the variance of the channel. The UE is determining whether it is moving or stationary as a way to know whether the channel is changing a lot or a little, to know how much the channel is varying.
23. The method of claim 21 , wherein said determining whether the UE device is moving or stationary comprises determining a current Doppler shift experienced by the UE device.
Determining whether the UE is moving or stationary COMPRISES determining a current Doppler shift experienced by the UE device. The determining whether the UE is moving or stationary involves measuring the Doppler shift, so the Doppler shift is used to determine if the UE is moving.
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October 21, 2014
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